Next-to-Leading Order QCD corrections to the Lifetime Difference of $B_s$ Mesons

Alexander Lenz

In this talk we present a calculation of the dacay rate difference in the neutral $B_s-{\bar{B}}_s$ system, $\Delta {\Gamma }_{B_s}$, in next-to-leading order (NLO) QCD. We find a sizeable decreas…